Re: Follow up on Jira Issue 39549

2022-06-24 Thread Sean Owen
No, programs can't read information out of other processes's memory - this is true of all software. A cached DataFrame is tied to a Spark application, but many things could be running inside that app. You may be thinking of something like, exposing some kind of service on the driver that responds

Re: Follow up on Jira Issue 39549

2022-06-24 Thread Chenyang Zhang
Thanks for response. I want to figure out is there a way to share data without writing it to disk because of performance issues. Chenyang Zhang Software Engineering Intern, Platform Redwood City, California

Re: Follow up on Jira Issue 39549

2022-06-24 Thread Sean Owen
Spark is decoupled from storage. You can write data to any storage you like. Anything that can read that data, can read that data - Spark or not, different session or not. Temp views are specific to a session and do not store data. I think this is trivial and no problem at all, or else I'm not

Follow up on Jira Issue 39549

2022-06-24 Thread Chenyang Zhang
Hi, Thanks so much for the response from https://issues.apache.org/jira/browse/SPARK-39549. I am curious what do you mean by write down to a table and read it from a different Spark Application. Do you mean a table in a database or the Spark to_table() api? Could I read the table created in